package com.sky.service.user.impl;


import com.sky.context.BaseContext;
import com.sky.dto.SetmealDTO;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.admin.DishMapper;
import com.sky.mapper.admin.SetmealMapper;
import com.sky.mapper.User.ShoppingCartMapper;
import com.sky.service.user.ShoppingCartService;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.locks.Lock;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 添加购物车
     *
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        //只能查询自己的购物车数据
        shoppingCart.setUserId(BaseContext.getCurrentId());

        //判断当前商品是否在购物车中
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if (shoppingCartList != null && shoppingCartList.size() == 1) {
            //如果已经存在，就更新数量，数量加1
            shoppingCart = shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateById(shoppingCart);
        } else {
            //如果不存在，插入数据，数量就是1

            //判断当前添加到购物车的是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                //添加到购物车的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
                //添加到购物车的是套餐
                SetmealDTO setmeal = setmealMapper.getById(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());


            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     *
     * @param
     * @return
     */
    public List<ShoppingCart> showShoppingCart() {

        List<ShoppingCart> list = shoppingCartMapper.list(ShoppingCart.builder().userId(BaseContext.getCurrentId()).build());

        for (ShoppingCart shoppingCart : list) {
            //查看菜品价格跟购物车价格是否相同
            Dish dish = dishMapper.getById(shoppingCart.getDishId());
            if (dish.getPrice() != shoppingCart.getAmount()) {
                shoppingCart.setAmount(dish.getPrice());
                shoppingCartMapper.updateById(shoppingCart);
            }
        }
        System.out.println(list);
        return list;

    }

    /**
     * 减少菜品
     *
     * @param shoppingCart
     */
    @Transactional
    public void updateNumber(ShoppingCart shoppingCart) {
        ShoppingCart Cart = shoppingCartMapper.selectByCart(shoppingCart);

        Integer number = Cart.getNumber();

        if (number > 1) {
            Cart.setNumber(Cart.getNumber() - 1);
            shoppingCartMapper.updateById(Cart);
        } else {
            shoppingCartMapper.deleteCart(Cart.getId());
        }
    }

    /**
     * 清空购物车
     */
    public void deleteAllCart() {
        List<ShoppingCart> all = shoppingCartMapper.getAll();
        System.out.println(all);
        for (ShoppingCart shoppingCart : all) {
            shoppingCartMapper.deleteCart(shoppingCart.getId());
        }

    }
}
